Amir
Moussavi1, Bram Stieltjes2, Klaus H. Fritzsche3,
Frederik B. Laun4
1Medical Physics in Radiology,
German Cancer Research Center,
Heidelberg, Germany; 2Radiology, German Cancer Research Center, Heidelberg, Germany; 3Medical
Imaging and Biological Informatics, German Cancer Research Center,
Heidelberg, Germany; 4Medical Physics in Radiology, German Cancer
Research Center, Heidelberg, Germany
Spherical
shaped diffusion phantoms that mimic in vivo fiber crossings are presented.
Two crossing angles (45 and 90) and two packing types of the fibers in the
crossing were realized (stacked and interleaved). The fractional anisotropy
of individual fibers is can be adjusted between 0.52 and 0.95. High quality
ODF maps with a voxel resolution of 2x2x5 mm were acquired using a standard
diffusion weighted echoplanar diffusion sequence. Thus, the presented
phantoms allow for validity measurements of Q-ball imaging and reconstruction
approaches.